Make herdr follow main nixpkgs input

Avoids pulling in a separate nixos-unstable nixpkgs just for herdr.

flake.lock

@@ -2,7 +2,9 @@
   "nodes": {
     "herdr": {
       "inputs": {
-        "nixpkgs": "nixpkgs",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
         "rust-overlay": "rust-overlay"
       },
       "locked": {
@@ -41,22 +43,6 @@
       }
     },
     "nixpkgs": {
-      "locked": {
-        "lastModified": 1779911860,
-        "narHash": "sha256-ubcLAcKBDCZjhxw/kH5DL5GdBZQdzLqpkTe7HonvJVs=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "c0a89c379b4ac67c7b13b051ddbd4e0dbc9b0eaf",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
       "locked": {
         "lastModified": 1788405554,
         "narHash": "sha256-z3ACU3NTAstjK+JNjW0zmIH2Q0GYo2pgGfJddesv7Xo=",
@@ -74,7 +60,7 @@
       "inputs": {
         "herdr": "herdr",
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
         "rssdownloader-src": "rssdownloader-src"
       }
     },

flake.nix

@@ -8,7 +8,10 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
-    herdr.url = "github:ogulcancelik/herdr";
+    herdr = {
+      url = "github:ogulcancelik/herdr";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
 
     rssdownloader-src = {
       url = "git+https://codeberg.org/ulve/rssdownloader";